Slitting machine



Aug.2o,194o.l F, F SCHR.ER 2,212,457

SLITTING MACHINE Filed Nov. 18, 1939 3 Sheets-Sheet l Aug. 20, 1940. F.F. scHRu-:R

SLITTING MACHINE 3 Sheets-Sheet 2 Filed Nov. 18, 1959 Aug 20, 1940 F. F.scHRlER 2,212,457

SLITTING MACHINE Filed Nov. 18, 1939 3 Sheets-Shee'kl 3 Patented Aug.20, 1940 PATENT OFFICE SLITTING MACHINE Frank F. Schrier, Philadelphia,Pa., assigner to The Moore & White Company, Philadelphia,

Pa. a corporation of Pennsylvania Application November 1s, 1939, serialNo. 305,183

11 Claims.

This invention relates to slitting machinesk and, more particularly, toAmachines of this type usually employed in slitting paper. In theordinary slitting machine, when a wide web of paper is threadedtherethrough and it is desired to slit the web into numerous widths, a1ltheslitters are lengaged during the threading operation. This results inthe loss of a considerable amount of paper, since the operators have tohandle each lo slit width separately, Aand is inconvenient for theoperators in that each of the slit widths must be drawn up squarely andat the proper tension to insure proper winding on the winding shaft. Ofthe slitters employed in such a machine, the l5 `end slitters servemerely to trim the edges of the paper 'and the intermediate 'slittersdetermine the width of the various sheets which are being formed. It isdesirable in threading the paper that all such intermediate slitters bere- 2o?` moved from engagement with the paper, permitting the full widthweb to be threaded through and engaged with the Winding shaft. This fullwidth web can be very readily properly tensioned and squared to theWinding shaft under these Q51 circumstances, thus eliminatingconsiderable Waste and insuring better winding. y

An important object of this invention is the provision of a.construction enabling all of the intermediate slitter elements to bemoved from 3o their operative positions and to be rapidly andconveniently returned to service after the paper web has been threadedthrough the machine.

' Another object of the invention is the provision vof a construction ofthis character which may d be very readily incorporated in the ordinaryslitter construction, or substituted for the elements of such aconstruction already existing in a inachine. I

Another object of the invention is the provision O. of a structure ofthis character incorporating the features above outlined, which may atthe same time be adjusted as to its position with the same facility asthe ordinary slitter elements now employed.` ;y AThese and other objectsI attain by the construction shown in the accompanying drawings wherein,for the purpose of illustration, vI have shown a preferred embodiment ofmy invention and wherein: I

Fig, l is a fragmentary perspective View of slitter mechanismconstructed in accordance with my invention;

Fig. 2 is a fragmentary front elevation show-` ing the vleft-hand sideof the machine;

Fig. 20, is a fragmentary front elevation showing a portion of theopposite side of the machine;

Fig. 3 is a front elevation` of a slitter element, the structure beingshown in solid lines in its operative position and in dotted lines inits inoperative position; 5'A

Fig. 4 is a rear elevation thereof partially broken away;

Fig. 5 is a side elevation thereof partially broken away; and

Fig. 6 is a section on line 6-6 of Fig. v5.

Referring now more particularly to the drawings, the numeral It]generally designates a rotatable shaft bearing a plurality of slitterdiscs II, over which the sheet I2 which is to be slit travels. Arrangedabove the shaft Ill is a bar I3 bearing a plurality of top slitterelements. The top slitter elements include end slitters I4 andintermediate slitters I5, each coacting with one of ther slitter discsIl. The function of the end slitters is that of trimming the edges ofthe 20'" sheet, while the intermediate slitters I5 cut the sheet intovarious widths, as desired. AIt is often necessary to shift the positionof the intermediate slitters due to the desire to'procluce'varyingwidths of sheets from the parent sheet delivered from the paper machine,and to this end it is desirable that the intermediate slitter elementsI5 be mobile and conveniently controllable. The end slitters are, on thecontrary, seldom in need of adjustment and may be of any usual orordinary construction, such, for example, as that herein illustrated.The construction of these` elements forms no part of the presentinvention and, accordingly, no description thereof is here given. Theintermediate slitters I5 comprise a bracket I5 adapted to clamp upon thebar I3 and to be slidably adjustable therealong. This bracket v embodiesa transversely extending bore Il mounting a stud I8, this bore beingformed in a boss I9 on the bracket. The boss I9 further incorporates alateral'nger 2l) the purpose of which will appear hereinafter. Stud I8pivotally mounts an arcuate arm 23, the arm being maintained in positionupon the studl by a wing nut 24. The free end of this arm 45 mounts astandard 25 bearing a slitter wheel` 26. This slitter wheel may beequipped with any suitable spring tensioning device such as is commonlyincorporated in devices of this characterk to maintain engagement of thewheel with the 50 associated slitter disc II. As at present shown, thewheel is urged in the direction of the arrow A, Fig. 4, by a spring 21acting upon the shaft 28 upon which this wheel is mounted through alever 29; any other suitable construction accomplish- 55 drawn position,illustrated in dotted lines in Fig.

5, by simply withdrawing the same until the pin 35 may be rotated toengage the end surface of the lug 36 on collar 3i in which this latch ismounted. Retention of the pin in its withdrawn position may be insuredby notching the end sur-` face of the lug, as indicated at 3l', if sodesired.

Mounted above and slightly to the front of bar I3 is a reciprocableshaft 38, one end of which is mounted in a suitable guide 39, soconstructed as to permit a slight Vertical play of the shaft. Theopposite end of this bar has connected thereto a shifting means f-ii, soconstructed as to loch the bar at either limit of its shifting movement.As at present shown, this shifting mechanism is illustrated as a toggleil operated through a counterweighted crank. ft2' secured to a shaftwhich is rotatably mounted in a bracket i6 secured to bar i3. Any othersuitable means may, howevenbe provided for controlling movement of thebar.

The collars 3i are each provided with a clamping arm 45 in which issecured a yoke 36 strad-v dling the shaft 38 and bearing a collar ilsurrounding the' shaft and adapted to be clamped thereto as by means ofWing screw 43. The clamping arm is preferably formed in sections which,upon separation, will free yoke i6 and permit swinging movement of theslitters in the direction of arrow B Figure 5, when the clamping nut t9of the bracket I6 has been released, thus enabling the slitter mechanismto be swung outwardly and permit release of the slitter wheel standard25 when it becomes necessary to replace the same for any reason. f

The arcuate arm 23 has a pair of lugs 53, 5i, th-e lug 5! having anadjusting set screw 52 directedv therethrough and adaptedto engage thenger 2Q of bracket i6, and serving to limit the extent of engagement ofthe slitter wheel 26 with its associated slitter disc Il. Lugs 53 servethe purpose of limiting the upward swinging movement of thewheel-bearing arm and constitute merely a safety device to preventover-manipulation of shaft 38.

In operation of the machine, during the actual slitting operation, theintermediate slitters occupy the position shown in Figure 2, whichfigure, with Figure 2a shows opposite ends of the machine between whichany number of intermediate slitters may be disposed.

Assuming that it becomes necessary to change the widths of the paperbeing cut from the web l2, toggle mechanism l0 is rst manipulated tothrow all of the intermediate slitters which are in operation from theposition shown in Fig. 2-

to that shown in Fig. 2a, this being accomplished by movement of thehandle element controlling the toggle from its dotted-line position inFigure 2a to its solid-line position in that iigure. This having beendone, the entire Width of web may be threaded through the slitter andconnected to the winding shaft as a unit, insuring uniform tension inthe sheet and greatly facilitating the operation of connecting to thewinding shaft as compared with the ordinary type of machine in thetoggle mechanism to its dotted-line position,

at which time all intermediate slitters which are to go intoservice willbe moved .to the position shown in Figure 2. When it is desired torender any selected intermediate slitter temporarily inoperative, it isonly necessary to shift shaft 33 to the left, which Yraises all of theoperative intermediate slitters out of the path of the paper, then clampthe wing nut 24 and release the pin 33 of the selected slitter. Thiswill free collar 3i, permitting this collar to oscillate idly as shaft38 is shifted to place the remaining slitters in operation. To returnthe inoperative slitter to operation, the shaft 38 is again shifted tothe left, moving all of the operative slitters to the inoperativeposition and thereafter re-engaging thek pin 33 of the inoperativeslitter.`

It will be obvious that with a construction of of many forms which myinvention may assume,4

I do not wish to be understood as limiting myself thereto except ashereinafter claimed.

I claim:

l. In a slitter of the type described, a plurality of discs over which asheet to be slit is adapted to pass, a support thereabove, a pluralityof slitter mechanisms carried by the support and each embodying aslitter wheel for coaction with one of the discs, said mechanisms-eachincluding a pivoted support for the slitter wheel whereby said wheelsmayV be moved into and out of engagement with said discs and ak sheetpassing thereover, in a plane generally paralleling the axes of saiddiscs and means to simultaneously move said pivoted supports to engagesaid slitter wheels with or disengage said slitter wheels from the discsand a sheet passing thereover.

2. In a slitter of the type described, a plurality of discs over which asheet tobe slit is adapted to pass, a support thereabove, a plurality ofslitter mechanisms carried by the support and each embodying a slitterwheel for coaction with one of the discs, said mechanisms each includinga pivoted support for the slitter wheel whereby said wheels may be movedinto and out o-f engagement with said discs and a sheet passing-`thereover, means to simultaneously move said pivoted supports, and meansto individually secure said pivoted supports against movement by saidmoving means.

3. In a slitter of the type described, a plurality of discs over which asheet to be slit is adapted to pass, a rotatable shaft on which thediscs are adjustably mounted, a stationary bar paralleling the shaft, aplurality of slitter mechcure said pivoted supports against movement bysaid moving means.

4. In a slitter of the type described, a plurality of discs over which asheet to be slit is adapted to pass, a support thereabove, a pluralityof slitter mechanisms Icarried by the support and each embodying aslitter wheel for coaction with one of the discs, said mechanisms eachincluding a pivoted support for the slitter wheel whereby said wheelsmay be moved into and out of engagement with said discs and a sheetpassing thereover, means to simultaneously move said pivotedy supports,and means to individually secure said pivoted supports against movementby said moving means comprising a member oscillatable about the pivot ofeach support, an operative connection between the moving member and saidoscillatable members, releasable means to connect the oscillatablemembers to their respective pivoted supports and means to rigidly securethe pivoted supports to the pivots thereof.

' 5. In a slitter of the type described, a plurality 'of discs overwhich a sheet to be slit is adapted to pass, a rotatable shaft on whichthe discs are adjustably mounted, a stationary bar paralleling theshaft, a plurality of slitter mechanisms carried by the bar and eachembodying a 4slitter wheel for coaction With one of the discs, saidmechanisms each including a bracket adjustably se-cured to the bar and asupport for the slitter wheel pivoted to the bracket whereby said wheelsmay be moved into and out of engagement with said discs and a sheetpassing thereover, means to simultaneously move said pivoted supports,and means to individually secure said pivoted supports against movementby said moving means comprising a member oscillatable about the pivot ofeach support, an operative connection between the moving member and saidoscillatable members, releasable means to connect the oscillatablevmembers to their respective pivoted supports and means to rigidly securethe pivoted supports tol the pivots thereof.

6. In a slitter of the type described, a plurality wheel for coactionwith one of the discs, said.

mechanisms each including a bracket adjustably secured to the bar and asupport for the slitter wheel pivoted to the bracket for movement in aplane substantially parallelto the shaft axis whereby said Wheels may bemoved into and out of engagement with said discs and a sheet passingthereover, and means to simultaneously move said pivoted supports toengage said slitter wheels with or disengage said slitter Wheels fromthe discs and a sheet passing thereover.

'7. In a slitter of the type described, a plurality of discs over whicha sheet to be slit is adapted to pass, a rotatable shaft on which thediscs are adjustably mounted, a stationary bar paralleling the shaft, aplurality of slitter mechanisms car- .ried by the bar and each embodyinga slitter wheel forrcoaction with one of the discs, said vmechanismseach including a bracket adjustably secured to the bar and a support forthe slitter wheel pivoted to the bracket for movement in a planesubstantially parallel to Athe shaft axis whereby said Wheels may bemoved into and out of engagement with said discs and a sheet passingthereover, and means to simultaneously move said pivoted supportscomprising a reciprocable shaft operatively connected to said pivotedsupports, means to shift said shaft and means tohold the shaft inadjusted positions.

8. In a slitter of the type described, a plurality of discs over which asheet to be slit is adapted to pass, a rotatable shaft' on which thediscs are adjustably mounted, a stationary bar paralleling the shaft, aplurality of slitter mechanisms carried by the bar and each embodying aslitter wheel for coaction with one of the discs, said mechanisms eachincluding a bracket adjustably secured to the bar and a support for theslitter wheel pivoted to the bracket for movement in a planesubstantially parallel to the shaft axis whereby said Wheels may bemoved into and out of engagement with said discs and a sheet passingthereover, means to simultaneously move said pivoted supports, and meansto individually secure said pivoted Supports against movement by saidmoving means.

9. In a slitter of the type described, a plurality of discs over which asheet to be slit is adapted to pass, a rotatable shaft on which thediscs are adjustably mounted, a stationary bar paralleling the shaft, aplurality of slitter mechanisms carried by the bar and each embodying aslitter Wheel for coaction with one of the discs, said mechanisms each.including a bracket adjustably secured to the bar and a support for theslitter Wheel pivoted to the bracket for movementl in a planesubstantially parallel to the shaft axis whereby said wheels may bemoved into and out of engagement with said discs and a sheet passlingthereover, and means to simultaneously move said pivoted supportscomprising a reciprocable shaft operatively connected to said pivotedsupports, means to shift said shaft, means to hold the shaft in adjustedpositions, and means to individually secure said pivoted supportsagainst movement by said moving means.

10. A slitter comprising a rotatable disc, a bar paralleling the axis ofthe disc, a pivot on said bar and disposed in a plane perpendicular tothe axis of the disc, an arm mounted on said pivot and bearing a slitterWheel for engagement with the disc, a member mounted for oscillationabout the same axis as the arm, releasable means connecting said arm andmember, means to oscillate said member, and means to hold said member inadjusted positions'.

11. A slitter comprising a rotatable disc, a bar paralleling the axis ofthe disc, a pivot on said bar and disposed in a plane perpendicular tothe axis of the disc, ran arm mounted on said pivot and bearing aslitter Wheel for engagement with the disc, a member mounted foroscillation about the same axis as the arm, releasable means connectingsaid arm and member, means to oscillate said member, means to hold saidmember in adjusted positions, 4and. means to clamp Said arm againstrotation about said pivot.

